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PK-88 OPERATING MANUAL
1.2
Specifications
As part of its program of product improvement, the manufacturer reserves the
right to change this product's specifications. Changes will be made to the
information in this document and incorporated in revisions to this manual.
Specifications are subject to change without notice.
1.2.1
Description
The Model PK-88 is an asynchronous PAD (Packet Assembler/Disassembler) or data
controller that includes a built-in modem for packet radio operation. The
PK-88 hardware HDLC system converts serial, asynchronous, ASCII data to the
internationally accepted AX.25 packet radio protocol via an EIA standard
RS-232 serial port. In addition, a Host mode, raw HDLC and KISS ('Keep It
Simple, Stupid') TNG protocols are available for applications other than AX-25
protocols,
Operating Modes:
1.2.2
Modem Characteristics
Modulator/Demodulator:
Data format:
Modem Tones:
Transmitter:
Modulation method:
Frequency accuracy:
Harmonics:
Receiver:
Demodulation method:
Output Level:
1.2.3
Processor System
Protocol conversion:
RAM:
ROM:
Hardware HDLC:
Packet Radio per AX.25, half- or full-duplex.
MailDrop - personal mailbox system
Host Mode with Raw HDLC and KISS TNC protocol for
service with TCP/IP and specialized applications.
AMD 7910 'World Chip' modem.
Serial, asynchronous
Bell 103 and Bell 202
Binary, phase-coherent NRZI FSK
Bell 202 (mark) +/- lHz
All others (mark) +/- 0.4 Hz
45 dB below fundamental, single tone
Differential FM detection
5 to 100 millivolts RMS, adjustable by
internal control
Zilog Z-80 microprocessor
32 kilobytes
Up to 48 kilobytes of ROM may be used
Zilog 8530 SCC
1-2
INTRODUCTION
PK88-16
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